Fix typo in as-properties docstring

Author: seancorfield

src/main/clojure/clojure/java/jdbc.clj

@@ -108,7 +108,7 @@ http://clojure-doc.org/articles/ecosystem/java_jdbc/home.html"}
        ks vs))
 
 (defn- ^Properties as-properties
-  "Convert any seq of pairs to a java.utils.Properties instance.
+  "Convert any seq of pairs to a java.util.Properties instance.
    Uses as-sql-name to convert both keys and values into strings."
   [m]
   (let [p (Properties.)]